Lexington vs Lexington and Concord

Lexington and Lexington and Concord both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lexington	Yes	No	No	No
Lexington and Concord	Yes	No	No	No

As nouns, Lexington and Lexington and Concord are synonyms defined as:

Lexington and Lexington and Concord: the first battle of the American Revolution (April 19, 1775)

Other synonyms of Lexington include Battles of Lexington and Concord, Concord.

Lexington (noun)	Lexington and Concord (noun)
the first battle of the American Revolution (April 19, 1775)	the first battle of the American Revolution (April 19, 1775)
town in eastern Massachusetts near Boston where the first battle of the American Revolution was fought and the first shots fired
a city in eastern Kentucky; noted for raising thoroughbred horses